LC's rolling with a round-cut diamond in a four-prong setting—here are five "inspired by" picks—while Heidi's diamond appears to be pink and cushion-cut with a white-diamond halo and a plain band. (If I remember correctly, Spencer picked it up from a sketchy costume jewelry site or something.)

If you had to pick one former Hills star's engagement ring for yourself, would you choose Lauren Conrad's or Heidi Montag's? Or is neither your style?